Sounds you cannot hear.
By: Illustrated by John Kaufmann.
Contributors: Kaufmann, John, illus.
Series: P-H junior research books
Publisher: Prentice-Hall
Published: 1963
Place of publication: Englewood Cliffs, N.J
Language: eng
Number of pages: 69
Subjects: Ultrasonics -- Juvenile literature; Ultrasonics; Sound
Description: Explains the principles of sound, ultrasonic sound, radar, and sonar and discusses how certain birds and fish use ultrasonics to guide them.